Darryl Keil Last Activity 2025-09-09 11:09 AM
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PaulH

Posts: 2

Joined: 2006-12-26

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Subject : Veneering a Box
Posted : 2006-12-26 4:18 PM
Post #33520
I am veneering 5 of 6 sides of a box. The 6th side is left open. Will it be possible to veneer the other 5 sides, or will the missing side cause the vacuum bag to burst inwards?

Thanks!


 
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Jeff Patrick


Joined: 2004-04-15
Location: Bainbridge Island, WA

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Subject : RE: Veneering a Box
Posted : 2006-12-26 5:02 PM
Post #33521 - In reply to #33520
The bag will want to suck into the open box. Depending on the box size, this may be damaging to your bag. It will undoubtedly be caused to stretch beyond the recovery point although it probably won't break. You could place the box in the bag with the open side down against the platen. Again, depending on the box size..... this really sounds like a job for hot hide glue and a veneer hammer.


 
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Don Stephan

Posts: 825

Joined: 2003-07-18
Location: Cincinnati, Ohio

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Subject : RE: Veneering a Box
Posted : 2006-12-26 8:03 PM
Post #33523 - In reply to #33520
First issue is the size of the box. On one of Darryl's videos, he shows that atmospheric pressure can easily snap 3/4" plywood. Depending on its size, the box might need internal support regardless of its orientation. Last spring I veneered a number of prototype display stands of different sizes. Some I supported internally with 2" pink styrofoam, but most were supported with an air form bag I purchased from Vacu-Press. It is demonstrated on I think Darryl's 2nd video. If you're making just one or two boxes, the styrofoam is less expensive. The air form takes some experimentation, as does horizonal vacuum veneering which was necessary given the height of some of my prototypes.

The display stands I made this way can be seen at www.stephanwoodworking.com and click on "Display Stands". Individual sizes are given on the various detail pages.


 
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PaulH

Posts: 2

Joined: 2006-12-26

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Subject : RE: Veneering a Box
Posted : 2006-12-26 10:46 PM
Post #33524 - In reply to #33523
Your display stands are exactly what I am doing.

Instead of doing things this way, I will do it a different way and have an enclosed box.

Thanks for the tips guys,
Paul


 
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Don Stephan

Posts: 825

Joined: 2003-07-18
Location: Cincinnati, Ohio

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Subject : RE: Veneering a Box
Posted : 2006-12-31 10:12 AM
Post #33525 - In reply to #33524
Simply having an enclosed box will not protect against vacuum bag implosion. If there is any way for the air inside the box to leak out even slowly over an hour in the vacuum bag the problem will arise. If the box is to be pressed in a vacuum bag, internal bracing still will be needed. Darryl's 2nd video is a recommended reference for the bracing requirement.


 
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Gregory Paolini

Posts: 17

Joined: 2005-02-22
Location: Western North Carolina

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Subject : RE: Veneering a Box
Posted : 2006-12-31 12:13 PM
Post #33526 - In reply to #33520
When I began using the vacuum press, there were a few items that imploded on me - To cut a long story short, I began filling most of my boxes and lite weight hollow forms with self expanding poly foam insulation. They sell this stuff at the box stores in small aerosol cans - Watch for it to go on sale, and stock up! Once cured, it will resist the bag's force, and keep the bag from sucking in, over stretching, and tearing. The foam will also keep your pieces from impolding.

Using a plastic shopping bag, or small garbage bag to spray the foam into, will keep the foam from sticking to your work piece, should you need to remove the foam after pressing (i.e. jewelry box applications, etc...)
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